package org.malred.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import lombok.extern.slf4j.Slf4j;
import org.malred.dto.DishDto;
import org.malred.entity.Dish;
import org.malred.entity.DishFlavor;
import org.malred.mapper.DishMapper;
import org.malred.service.DishFlavorService;
import org.malred.service.DishService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.beans.Transient;
import java.util.List;
import java.util.stream.Collectors;

@Slf4j
@Service
public class DishServiceImpl extends ServiceImpl<DishMapper, Dish> implements DishService {

    @Autowired
    private DishFlavorService dishFlavorService;

    /**
     * 新增菜品, 同时保存对应的口味数据
     *
     * @param dishDto
     */
    @Override
    @Transactional // 事务控制
    public void saveWithFlavor(DishDto dishDto) {
        // 保存菜品的基本信息到dish
        this.save(dishDto);
        // 保存后有id了
        Long dishId = dishDto.getId();

        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors = flavors.stream().map((item) -> {
            item.setDishId(dishId);
            return item;
        }).collect(Collectors.toList());

        // 保存口味数据
        dishFlavorService.saveBatch(flavors);
    }

    /**
     * 根据id查询菜品信息和对应的口味信息
     * @param id
     * @return
     */
    @Override
    public DishDto getByIdWithFlavor(Long id) {
        // 查询菜品基本信息,从dish标查询
        Dish dish = this.getById(id);

        DishDto dishDto=new DishDto();
        BeanUtils.copyProperties(dish,dishDto);

        // 查询当前菜品对应的口味信息,从dish_flavor查询
        LambdaQueryWrapper<DishFlavor> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,dish.getId());
        List<DishFlavor> flavors = dishFlavorService.list(queryWrapper);
        dishDto.setFlavors(flavors);

        return dishDto;
    }

    @Override
    @Transactional
    public void updateWithFlavor(DishDto dishDto) {
        // 更新dish表基本信息
        this.updateById(dishDto);
        // 清理当前菜品对应口味数据 dish_flavor delete
        LambdaQueryWrapper<DishFlavor>queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,dishDto.getId());
        dishFlavorService.remove(queryWrapper);
        // 添加当前提交过来的口味数据 dish_flavor insert
        List<DishFlavor>flavors=dishDto.getFlavors();

        flavors=flavors.stream().map((item->{
            item.setDishId(dishDto.getId());
            return item;
        })).collect(Collectors.toList());

        dishFlavorService.saveBatch(flavors);
    }
}
